Related Clues:

• Arctic or Antarctic
• Where an echograph is used in measuring
• Davy Jones's locker
• Posei-don's domain
• Crossing site
• Atlas expanse
• Shark's body?
• 'Caribbean Queen' singer Billy
• It has a big floor
• Briny body
• Continent divider
• Pirates' domain
• Continental divider
• Wet expanse
• Broad expanse